What do retention policies in Exchange Server manage?

Retention policies in Exchange Server are essential for managing the lifecycle of emails and data. These policies allow administrators to define how long emails and other types of content should be retained in users' mailboxes. This can include determining when emails should be archived, deleted, or moved to different folders based on their age or other criteria.

Retention policies are particularly important for compliance and legal requirements, as organizations often need to retain certain types of information for specific periods. By implementing these policies, organizations can ensure that they are adhering to regulations and protecting sensitive information, while also optimizing mailbox storage and performance.

The other aspects mentioned in the choices do not relate to how retention policies function. User management interfaces, encryption protocols, and mailbox storage capacity are important components of Exchange Server but do not directly involve the management of email lifecycle and retention.